Answer:
The answer is B. Fact
Explanation:
A hypothesis is the step of the scientific method in which an opinion is given about an environmental event that has been observed and analyzed. This hypothesis is generated with the purpose of answering a question of the "Why" of the observer events, and must always be experienced and demonstrated to know its truthfulness.
Since Jan's hypothesis, after having been tested, obtained good results, positive conclusions can be drawn from this hypothesis and can be considered as a scientific fact, because it has the approval of the scientific method.
